Telephone mouthpiece keyboard



FIG. 1 is a perspective view of a telephone mouthpiece keyboard, showingour new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevation view thereof, all side views beingsubstantially identical; and

FIG. 4 is a bottom plan view thereof.

The ornamental design for a telephone mouthpiece keyboard, as shown anddescribed.